What does peracetic acid do to your body?

Understanding the effects of peracetic acid on the body

Peracetic acid is a powerful antimicrobial agent commonly used in healthcare, food processing, and industrial sanitation. While effective at killing pathogens, it can pose serious health risks if not handled properly. Exposure typically occurs through inhalation or direct contact, and the effects on the body depend heavily on concentration and duration.

At high, lethal concentrations, peracetic acid can cause severe damage to the respiratory system. Symptoms include hemorrhage (bleeding in the lungs), pulmonary edema (fluid buildup), and consolidation of lung tissue, which impairs oxygen exchange. These effects can lead to acute respiratory distress and, in extreme cases, death if not treated immediately.

Even at lower, nonlethal levels, exposure is not without consequence. Individuals may experience mild to moderate irritation of the respiratory tract—coughing, sore throat, and shortness of breath are common. Some studies also report transient weight loss or reduced weight gain, particularly in animal models, suggesting that chronic low-level exposure may affect overall health and metabolism over time.

Because peracetic acid is highly volatile and corrosive, proper ventilation, protective equipment, and adherence to safety protocols are essential in workplaces where it's used. Symptoms often resolve once exposure stops, but repeated contact increases the risk of long-term respiratory issues.

While invaluable in controlled settings, peracetic acid demands respect. Its potency makes it a double-edged sword: excellent for disinfection, but potentially harmful when safety is overlooked. Awareness and precaution remain key to minimizing health risks and ensuring safe use in industrial and medical environments.